Session H2: Disorder in Quantum Gases
10:30 AM–12:30 PM, Wednesday, June 6, 2012
Room: Grand Ballroom GF
Chair: Brian DeMarco, University of Illinois Urbana-Champaign
Abstract ID: BAPS.2012.DAMOP.H2.1
Abstract: H2.00001 : Studies of disordered quasi-2D Bose gasses
10:30 AM–10:42 AM
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Authors:
Matthew Reed
(JQI/UMD)
Zack Smith
(JQI/UMD)
Steven Rolston
(JQI/UMD)
We present trapped quasi-2D bose gasses in an optical speckle disorder. The disorder's correlation length, at 1 micrometer, is on the order of the atomic de-Broglie wavelength ($\Lambda$ between 350 and 500 nm) and the healing length (250 to 1000 nm) of our trapped gasses. This is a parameter regime whose properties have been resistant to analytical and numerical study, and in the case of disorder with a nontrivial autocorrelation function, the ground state is unknown. Using one plane as a phase reference for a second, we analyze the coherence properties of the trapped gas by studying both the average phase in the imaging direction and the visibility of the fringes. We correlate a reduction in phase coherence with increased variance of the disorder, and correlate this with both phonon and vortex statistics in both adiabatically prepared samples and in quenched gasses.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2012.DAMOP.H2.1